Pliers



p 1943. P. VAN SlTTERT ETAL 2,328,866

PLIERS Filed Oct. 10, 1941 INVENTORS 29' PAUL VAN SITTEET ANDREW J LEV .9 BY ATTORNEY alie ation This invention relates toimprovements; in V pliers for plate holders. Srnallspringclamps; called plate holders, are *in wideniiselintthe air-g i plane industry for holding-metal plates together,

during riveting operations, such holders .being a described and claimed for eXam'ple iniU Lent No. 2,136,875.. In the fabrication ,of air i planes two plates that are ttogrbe riveted io-n gethen'after the rivet holes are1drilled,are-po sitioned in the desired relation twithbtheirjgrivet holes registering, after which plate. holders; are

the two plates together .while. rivets are being'i 1 arewremoved and the remaining "rivets' aremin plate holders.

ision of pliers forthelpurpose indicated which 'ty production at relatively low cost." 1

Another objectjis theprovision of pliers er the ,1 type described embodyingmeans for preventing aholder from snapping out of placeafteror durv ing-the operation of the pliers to compressthe i a holder spring. The holder springsare relatively heavy and if a holder is inadvertently released while the spring is compressed it will snapout of th pliers withconsiderable force and may cause thepresent invention to preventsuch accidents.

pearaas we proceed with the description of that embodiment of the invention'which, for the t Fig. 1 is. a side viewof a pair of pliers em'body-;

ng the invention,the pliers being shown in open position with a plate holderfinserted. a

substantially on the lines 22 and 3-3res'pec pliers, looking i s d the direction of arrows, 4 -341 oiFigJ. i i

hwith the jawspartiallyclosedl j p Fig. 6 is another similar view with the mjaws completely closed and the spring compressed to 1 holes.

serted and set. Thepliers OfwthQDTIlblI1VBIlrJ tion are designed for inserting andire moyingfthe i i bodily injury to a workman. It is an object of Other "objects and features of novelty willap Fig. 5 is a fragmentalview similar toFigQ Figs and 8 are cross-'sectionaldetail viewson p ajfsornewhat largerscalathe views being take n w re One r the objectsofithe inventio'nfisthe reg n I "20, shall be of simple eonstruction adaptedto quand I0 terminating fat; its lowerfendl'i insertedinsome of the registeringholes toclamp I platevl I has an "opening therethrough. which it carries t a depending fingers 1135 which is crescent shaped in cross fsectionas shownlinf theiabovementioned patent;: Aplungen projects 1 through ahole nLbase, Hiadjacent finger I Beand; 1'

i Paul-Van Sitter-t Shaker Heights, andA ndrew J ,1 i they, Garfield Hei glits,M0hio, assignors to The t Cleveland Pneumatic Tool Cpmpany, Cleveland}: ohiogacorporation fOhi oetebee ogiesr,seiiaim..41 i,45o i "we 91 8 451 a a in substantially on thelines 1-1 and 8 respecj Fig 10 is a fragmentary perspectivelvievwofsthe pliers landlmore] clearlyvil H r I i in which I the flower aw are Tfabricate'dtt lustrates lthei mariner As shown in the Ldra ing aplate holder in c employedisillustrated as comprisin'gi a l cylin'der has a shank '2, of lsuchigcross section that *gether with'ffinger ls it is adapted to n11 regis-YT tering rivet holes-15in apairfof plates IGto be i joined together, The shank 1.41 has a circular i twiiaqa i size which will permit it toslidef throughholes l5,'the upper part of thefoot A being bjevelld'on one side. The shank H! with its foot l4 constitutes the lower end of the i a s5 purposes of the present application, weuhave il- .lustrated intheaccompanying drawing, in which Figs; 2 and 3 are cross-sectional views taken:

"plungerwhich projects through the cylinder l0. 3 and has a head 11 at its upperbextremity. A-coil v spring I 8 surrounds the plunger and bears atits lowerend against base plate H and atits upper end against the hea'dl'ljof the plunger. twhen thehead I! is pushed downward relatively to the x cylinder, es in Figs. 6 andi8, thefoot M will be causedto passthrough aligned ,rivet'holes,

after whichthe finger l3 and shank may also be caused to extend through the holes, permitting the base I I to engage the surfaceof the upl per one of thetwo plates l6. Then when the operator relieves the pressure upon spring I8 the plungerwill be drawn upwardly and the "bevelled face on the foot- M" will engageone edge of the hole I5pin the lower plate I6 and t z i will pull the plates together against the base He 1 nopartoi the present invention.- n n a The pliers which arethe subject of thisinvenof the'holder. The foregoing construction and its operation are well known in the art and form tion maybe conveniently constructed of stamp- Iingaand comprise two handles and 2!. A e jaw 22 on the end of handle 2| is straddled bye.

"1 split jaw 23 on'the end of handle zmand these two elements of the pliers are connected by a pivot 24. Jaw'22 isprovided witha small seniispherical boss 25 adapted to provide substantially perspective view of the on IiBCtiQnl withfwhich our no elz plier's rare? to The 10 aserplateli Lltiwhichlmay,tproj ectvfrnoregor less eyond the peripheryaiof the"?cylinden ipropr 2 set in the remaining holes, andthenths holders;

adjacent; i

I er snugly the cylinder a one point bearing upon the head '1' of the plunger of-a holder. 7 I

.The vertical walls of the split jaw 23 are generally flat, but may have reinforcing ribs 26 formed therein if desired; The walls of this jaw are laterally spaced to receive between them rath- IlLOf a qlfiler. and wa force them gthey :bej t iinedbl 'a' nqge 215221 indicated iinFi'gs. 4 and '9'. Beyond thebr'idgefi'r" these walls, during the fabrication of the tool, 19 are formed with.longitudinallyextending slits 23 therein which fall short of the free longitudinal; ends thereof and leave near the upper ends of the Walls asbest shown in Fig.- 1G; narrow seg% merits 29 that are curved O'lltWQlfdlYltO fitaroundfl the collar I2 of a holder and to embr'ace'the' col lar beyond the axis of the holder. The upper ends of the vertical walls belowthesegfnent's 29-1 form a-pair of parallel longitudinally extending, seats 29' forthe collar l2 of a holder. In'otheffl) words,fthe---material is .cut.;'for;a portiommiyits I length and the separated part is curvedoutwardjiv; to form; the segments 29;; there being a space between said segmentsjandrthe"seats: QEL identiE fied;as.thei slit;28.. I\ I -When': a: holder-1 has tea. at in ;position iwi th I its cylindet'rlllr betWeen.theifiat-walls of the-s lit..-

jawf :23:5 and." with 'its (collar 4! Z resting 'upon -the seatsi'29'; and the p'eriphery-ofr'its collar embraced:

by:ithegannularasegments 29;. the holder; cani'not: 30;

be removed by. an. outward motion: alone; that is tOsay itmust'fi'rstbe raisedto enable theicollan I2 ;.to::clea'r the; asegments 29;: 'before'the hblder', can be. withdrawn fromathe'split jaw of the pliers:

Hence; when a holderis' in. place: and the spring 35; IBuhas been compressed itis impossible. for; the holder to-Jsnapoutsof place. @As' an; additional safety measure we provid guardlip 30 .on'gjawiZ ZL tOpverhangthe plunger I I head? I 'I of a holderanduthus p rovide' :further 4O; I

means for preventing the snapping of the holder I out of the pliers, particularly in the event that the holder is not properly set within the split jaw before the spring is compressed.

Obviously, the present invention is not restricted to the particular embodiment thereof herein shown apd described. lvloreover it is not. indispensable that all an eta {0135 the inventiom be' used' conjoiiitly,"

tions and subcombinations. I

I Having thus described our invention, We claim;

1. A pairof pliers for inserting and removing I plate holders 'cornprising, pivoted upper and lowierrjawsfif'saidjupperf jaw adapted to engage the head. 'f! tn pmnger of a holder and said lower jaw to engage the cylinder of the holder beneath the' e'ol-lar thereof, said lower jaw including a pair of. spacedvertical walls, the upper end of each of 'said"vertical walls being longitudinally split a 1 for a. p0rtion .o:its clength: 'iandritlie. :area of. (said walls; above isaid isplitlbeingnuiiwardly curved to. form segmental' shaped; portions for.- engaging said collarontwardlyfofitheholder axis.

'---2i:A 'paifriof. pliers forinserting;and"removing platej holder's; comprisinge pivote'di upper and. low: I .eri jawsg said iupp'eii jaw) adaptedtt'o engage the head of. the plung'eia-of a..h'older -and tsaid lower jam to: engage the -cylin'de'r ofthe-holder fbeneatht the .collanithereof ,5 said: lowenij avfizincluding a..-'pair. ofaspacedovertical wall-si the'lupperiendi of each of. z-fsaid ;verti.eal walla. being. longitudinally split; fort-3a v portion: of its :lengtlrl to forms a strrip -like" seatif'on the collarslof. thelholdenl and the area .or.

the-Wall's above saidzseatssbeing bunv'ardlyxcurvedy f to. form segmental; shaped portiensi for engaging.- said collar outwardly of the holder axis'.

. I PAUL .VAINJ- elm-Earl ANDREW ZTLQIBEWI sincetl'iey may be 7 employed advantageously in various combina- 

